(require 'package)
(let* ((no-ssl (and (memq system-type '(windows-nt ms-dos))
                    (not (gnutls-available-p))))
       (proto (if no-ssl "http" "https")))
  (when no-ssl
    (warn "\
Your version of Emacs does not support SSL connections,
which is unsafe because it allows man-in-the-middle attacks.
There are two things you can do about this warning:
1. Install an Emacs version that does support SSL and be safe.
2. Remove this warning from your init file so you won't see it again."))
  ;; Comment/uncomment these two lines to enable/disable MELPA and MELPA Stable as desired
  (add-to-list 'package-archives (cons "melpa" (concat proto "://melpa.org/packages/")) t)
  ;;(add-to-list 'package-archives (cons "melpa-stable" (concat proto "://stable.melpa.org/packages/")) t)
  (when (< emacs-major-version 24)
    ;; For important compatibility libraries like cl-lib
    (add-to-list 'package-archives (cons "gnu" (concat proto "://elpa.gnu.org/packages/")))))
(package-initialize)

;gpg signature for elpa seem to be no longer valid
(setq package-check-signature nil)

; fetch the list of packages available
(unless package-archive-contents
  (package-refresh-contents))

; list the packages you want
(setq package-list '(use-package org php-mode erlang treemacs))

; install the missing packages
(dolist (package package-list)
  (unless (package-installed-p package)
    (package-install package)))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

; automatic backups will be saved to temp
    (setq backup-directory-alist
          `((".*" . ,temporary-file-directory)))
    (setq auto-save-file-name-transforms
          `((".*" ,temporary-file-directory t)))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

; treemacs settings
(use-package treemacs
  :ensure t
  :config
  (progn
    (setq
     treemacs-is-never-other-window t
     treemacs-git-integration t
     treemacs-show-hidden-files nil
     )
    (treemacs-follow-mode t)
    (set-face-attribute 'treemacs-root-face nil
                        :height 1.0
                        :underline nil))
  :bind
  (([f8] . treemacs)
   ("C-c t" . treemacs-select-window)))